increasing pure race as it spread onto the Plains and to 
the Northeast in its well known forms of northern flour 
and northern flint. ‘The presumed Colombian ancestor, 
Cabuya, is a highland race, and this might account for 
some pre-adaptation to high altitudes and northern lati- 
tudes in United States, as exemplified by the early distri- 
bution of Maiz de Ocho (Galinat and Gunnerson, 1968). 
The Maiz de Ocho from the BR-45 Site was moved 
by its cultivators to sites with moist soil along the river 
after a protracted dry period made the mesa unsuitable 
for the growth of their maize. At the lower elevations, 
it became further mixed with the older indigenous race, 
Chapalote, in Basketmaker II] times at the end of the 
Alameda Phase. The radiocarbon date of A.D. 870+ 
168 marks the introduction of this eight-rowed maize 
into the strata at Boca Negra Cave. A somewhat later 
date of A.D. 550 to A.D. 700 follows for this race just 
north of Albuquerque at the Artificial Leg Sites. By 
A.D. 1040 Maiz de Ocho had reached the Blain Site in 
Ohio (Galinat, 1969) and by A.D. 1125+70 the Miller 
Site in Ontario (Kenyon, 1968). While the frequency 
and purity of Maiz de Ocho increased during its spread to 
the Northeast, some traits of Chapalote derived from an 
ancestral mixing inthe Southwest may still be recognized 
in the Canadian and New England flint corn varieties. 
[329 ] 
